This information certainly isn't new information, but the scientific study of is news to me.
Kanazawa has done previous research suggesting that nurses, social workers and kindergarten teachers—those with “empathic” traits—also had more daughters than sons. Meanwhile, he found that scientists, mathematicians and engineers are more likely to have sons than daughters.True 'nuff.
It is good that Kanazawa is only a researcher and not, say, the president of Harvard. If he were, that last finding about scientists may have gotten him fired.
But what this means is that we must all now think of our friends and family, those people we know best, and unscientifically extrapolate where we came from on this new evolutionary ladder.
I am Jack's unparalleled worry...